Pin tube



April 6 ,1926. 1,579,939

I. S. HUNKINS PIN TUBE Filed Dec. 4, 1925 7, BY g 2 ATTORNEYS Patented Apr. 6, 1926,

WILLIAM S. HUNKINS, OF

HOLLYWOOD, CALIFORNIA.

PIN TUBE.

Application med December T 0 all whom it may concern:

Be a clti it known that I, WILLIAM S. Humans, zen of the United States of America,

residing at Hollywood, California, have in- 5 vented a new and useful Pin Tube, of which the following is a specification.

This invention relates to certain new a n d useful improvements in socalled pintubes the purpose of which is toprovide a simple construction which will admit of the tube being secured by stitching to a garment in such a manner as to prevent it from sliding endwise in the stitch loops in the event of side pull thereon.

In the accompanying drawing-e Fig. 1 is a relatively enlarged front elevation of my improved pin tube as it appears in use;.

Fig. 2 is a rear itself of Fi 1 r upon elevation of the pin tube Fig. 31s a cross section on the line 3-3 2- epresents conventionally a fabric base which the tube is to be secured. The

tube is made of sheet metal rolled up to form a tub ular portion 2, one edge of the rolled up metal being oifset from the tube portion to form what I may call a securing member 3. This securing member is provided with a pluralityof alined slots or elongated perforations 4-4, formed by punching out the metal and rolling the same back to form folds 55. This act at once provides a rounded edge along the upper edge-ofeach of the openings 4- 1. By this formation, I

provi de at least three spacer bars 6 66. represent two sets of stitch loops of 'to form the folds 5 presented to that part of the stitching 4, 1925. Serial No. 7 3,293.

thread by which the device is secured'to the base 1. It will be observed that the two sets of stitch loops are spaced apart so as to 40 support the tube from points near its ends, and it will also be observed that in the event of end strain on the tube, at least two ofthe spacer bars 6-4) will encounter the stitches and thus prevent the tube from sliding end- I against which the strain occurs, and hence any tendency to cut or fray the stitches is practically eliminated.

What I claim is:

1; In a pin tube construction, a rolled sheet metal tube having a laterally extending flange, said flange having a plurality of elongated perforations therein, the metal at the upper edges of said perforations being folded back to form rounded non-cutting edges, said perforations being in substantial alinement. r

2. In a pin tubeconstruction, a rolled sheet metal tube having a laterally extending flange, said flange having a plurality of elongated perforations therein, said perforations being in substantial alineinent.

WILLIAM S. HUNKINS. 

